
.header,.slider{
    position: fixed;
    top:0;
    left: 0;
}
.header{
    width: 100vw;
    height: 50px;
    background: orange;
    z-index: 20;
}
.slider{
    width: 100px;
    height: 100vh;
    background: #ddd;
    z-index: 10;
    padding-top: 65px;
    box-sizing: border-box;
}

.content{
    width: 100vw;
    height: 100vh;
    padding: 65px 15px 15px 115px;
}
